Question 1

How do I add custom CSS to style ESPUI controls?

Accepted Answer

Use functions like setPanelStyle() or setElementStyle() before ESPUI.begin() to apply inline CSS. For global styles, setCustomCSS() allows adding custom CSS files, but this requires manual setup and string management.

Question 2

ESPUI or Blynk: which is better for offline IoT projects?

Accepted Answer

ESPUI is superior for fully offline, self-hosted interfaces since it runs entirely on the ESP without external servers. Blynk often depends on cloud services, making ESPUI ideal for standalone applications where internet access is unavailable.

Question 3

Can ESPUI handle dynamic UI updates and multiple tabs?

Accepted Answer

Yes, it supports tabs via addControl() with parent IDs and dynamic updates through functions like updateSlider(). Changes sync in real-time across clients using WebSockets, but tab usage requires more verbose code compared to basic controls.

Question 4

How to install ESPUI with PlatformIO?

Accepted Answer

Add ESPUI and dependencies like ESP Async WebServer to your lib_deps in platformio.ini. For ESP8266, include ESPAsyncTCP; for ESP32, use AsyncTCP and LittleFS_esp32, as detailed in the installation section.

Question 5

Is ESPUI suitable for battery-powered devices?

Accepted Answer

It can be, but WebSocket communication and serving web resources may increase power consumption. Optimize by reducing UI complexity and using ESP deep sleep modes, though this isn't covered in the documentation.

Question 6

How to create a graph for sensor data in ESPUI?

Accepted Answer

Use the experimental graph widget with addGraphPoint() to add data points, but note it's incomplete and stores data in browser local storage, making it unreliable for production. The library encourages contributions to improve this feature.

ESPUI

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